Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 150, NWS Twin Cities, MN

July 15, 20114 counties in Minnesota

NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 15, 2011, 2:45 PM CDT for 4 counties in Minnesota. It was in force for 44 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 15, 2011, 2:45 PM CDT (19:45 UTC)
Expired: Jul 15, 2011, 3:29 PM CDT
In force: 44 min
Issued by: NWS Twin Cities, MN
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Blue Earth County, MN, Le Sueur County, MN, Nicollet County, MN, Waseca County, MN

The radar

The Minneapolis radar (KMPX), 92 km from the middle of the area, began a volume at 19:47 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 15, 2:59 PM CDT	TSTM WND DMG	2 E Lake Crystal, MN	TREE DOWN ON A ROOF OF TRAILER

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Minneapolis, MN (KMPX), launched 12:00Z, 7.8 hours before the alert went out and 91 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 1183 J/kg
Mixed-layer CIN: -78 J/kg
Mixed-layer LCL: 585 m above ground
0-6 km bulk shear: 28 kt
0-1 km storm-relative helicity: 101 m²/s²
0-3 km storm-relative helicity: 135 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 3.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

003 
WUUS53 KMPX 151945
SVRMPX
MNC013-079-103-161-152045-
/O.NEW.KMPX.SV.W.0150.110715T1945Z-110715T2045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
245 PM CDT FRI JUL 15 2011

THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  BLUE EARTH COUNTY IN SOUTH CENTRAL MINNESOTA...
  SOUTHWESTERN LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA...
  EASTERN NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA...
  WESTERN WASECA COUNTY IN SOUTH CENTRAL MINNESOTA...

* UNTIL 345 PM CDT

* AT 243 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS...
  CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THESE
  STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST
  OF NICOLLET TO NORTH MANKATO TO DELAVAN...AND MOVING EAST AT 15
  MPH.  PENNY SIZE HAIL MAY ALSO ACCOMPANY THESE DAMAGING WINDS.

LOCATIONS IN THE WARNING INCLUDE...
  MANKATO...
  ST PETER...
  AMBOY...
  VERNON CENTER...
  NICOLLET...
  GOOD THUNDER...
  NORTH MANKATO...
  MAPLETON...
  EAGLE LAKE...
  ST CLAIR...
  KASOTA...
  PEMBERTON...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

IF YOU ARE IN THE PATH OF THIS STORM...PREPARE IMMEDIATELY FOR
DAMAGING WINDS IN EXCESS OF 60 MPH AND HAIL. SEEK SHELTER NOW INSIDE
A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS.

&&

LAT...LON 4385 9421 4416 9422 4442 9444 4440 9394
      4417 9372 4385 9370
TIME...MOT...LOC 1945Z 269DEG 14KT 4435 9425 4416 9409
          4382 9407
WIND...HAIL 60MPH 0.75IN

$$

1 follow-up statement

438 
WWUS53 KMPX 152029
SVSMPX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
329 PM CDT FRI JUL 15 2011

MNC013-079-103-161-152044-
/O.CAN.KMPX.SV.W.0150.000000T0000Z-110715T2045Z/
LE SUEUR MN-NICOLLET MN-WASECA MN-BLUE EARTH MN-
329 PM CDT FRI JUL 15 2011

...THE SEVERE THUNDERSTORM WARNING FOR BLUE EARTH...WESTERN WASECA...
EASTERN NICOLLET AND SOUTHWESTERN LE SUEUR COUNTIES IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAVE MOVED OUT OF THE
WARNED AREA.

LAT...LON 4385 9421 4416 9422 4442 9444 4440 9394
      4417 9372 4385 9370
TIME...MOT...LOC 2029Z 269DEG 14KT 4435 9401 4416 9385
          4382 9383

$$

The office that day

Everything else NWS Twin Cities, MN issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 15, 3:40 AM CDT	Excessive Heat Watch	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more	36 hr
Jul 15, 4:58 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	62 min
Jul 15, 5:55 AM CDT	Areal Flood Advisory	MPX	Douglas, Todd	3 hr
Jul 15, 6:13 AM CDT	Special Weather Statement	MPX	Todd	62 min
Jul 15, 6:19 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Stearns, Todd	56 min
Jul 15, 6:44 AM CDT	Severe Thunderstorm Warning	MPX	Stearns, Todd	61 min
Jul 15, 6:50 AM CDT	Severe Thunderstorm Warning	MPX	Douglas	55 min
Jul 15, 7:05 AM CDT	Severe Thunderstorm Warning	MPX	Stearns	55 min
Jul 15, 7:11 AM CDT	Special Weather Statement	MPX	Morrison	79 min
Jul 15, 7:33 AM CDT	Severe Thunderstorm Warning	MPX	Douglas, Pope, Stearns, Todd	57 min
Jul 15, 8:14 AM CDT	Flash Flood Warning	MPX	Douglas, Todd	3 hr
Jul 15, 8:37 AM CDT	Special Weather Statement	MPX	Stearns	53 min
Jul 15, 8:51 AM CDT	Flash Flood Warning	MPX	Pope, Stearns	3 hr
Jul 15, 9:00 AM CDT	Severe Thunderstorm Warning	MPX	Meeker, Stearns, Wright	45 min
Jul 15, 9:36 AM CDT	River Flood Warning	MPX	Todd	5 days
Jul 15, 10:12 AM CDT	Special Weather Statement	MPX	Anoka, Hennepin, Sherburne, Wright	63 min
Jul 15, 11:07 AM CDT	Special Weather Statement	MPX	Freeborn, Steele	38 min
Jul 15, 12:41 PM CDT	Severe Thunderstorm Warning	MPX	Dakota, Goodhue, Rice	52 min
Jul 15, 12:52 PM CDT	Flood Watch	MPX	Anoka, Blue Earth, Brown, Carver, Chippewa, Dakota and 22 more	13 hr
Jul 15, 3:09 PM CDT	Areal Flood Advisory	MPX	Blue Earth, Carver, Le Sueur, Nicollet, Rice, Scott and 2 more	3 hr
Jul 15, 3:20 PM CDT	Special Weather Statement	MPX	Freeborn, Le Sueur, Rice, Steele, Waseca	55 min
Jul 15, 3:34 PM CDT	Severe Thunderstorm Warning	MPX	Freeborn, Rice, Steele, Waseca	26 min
Jul 15, 3:35 PM CDT	Flash Flood Warning	MPX	Dakota, Le Sueur, Rice, Scott, Steele, Waseca	3 hr
Jul 15, 3:46 PM CDT	Excessive Heat Warning	MPX	Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more	5 days
Jul 15, 3:50 PM CDT	Flash Flood Warning	MPX	Dakota, Goodhue, Rice	3 hr
Jul 15, 4:55 PM CDT	Areal Flood Advisory	MPX	Faribault, Freeborn, Steele, Waseca	3 hr

Nearby

Severe Thunderstorm Warnings in Minnesota, 2011 Every severe thunderstorm warning in 2011

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.